On 27.01.2004 10:54:41, Masahide Kanzaki wrote:
>Hi Libby, nice validator :)
>
>I have a question on dc:rights example in
>>http://esw.w3.org/topic/W3PhotoVocabs
>
>You put an example for 'license and rights properties for the metadata'
>something like:
>
> <dc:rights>
> <cc:Agent>
> <dc:title>Libby Miller</dc:title>
> <dc:date>1001-07-23</dc:date>
> </cc:Agent>
> </dc:rights>
>
>Should this cc:Agent have dc:date ? What does this date mean ?
>
>I think you've taken this fragment from CC's "Extending Creative Commons
>Metadata" page, and it includes dc:title actually. But the page explains
>this dc:date that "As you can see the copyright holder is a person with a
>URL, a name and a date (of birth)." (forget about URL here..)
>
>If the above dc:date is intended as the copyright date, it should be the
>date of the creation (of a photo), and thus I think it should be a property
>of the Image itself, not of Agent (or at least needs another node along
>with Agent). Make sense ?
As far as I understand the CC instructions at [1], it is the date of birth
of the agent who "owns" the metadata. IMHO we could omit dc:date for
Agent. in CC's third example code they don't mention a dc:date (probably
because they are talking about an organization).
Furthermore cc:Agent seems to be equivalent to foaf:Agent, so we could
perhaps state "foaf:Agent owl:equivalentClass/rdfs:subClassOf cc:Agent".
then we could add a foaf:mbox_sha1sum to cc:Agent to better identify the
metadata "owner". (don't know if people are going to enter a valid date
of birth..)
another question:
is there a difference between the author of the metadata and the agent in
dc:rights of the metadata?
if they are (always) the same we could use a nodeID for more compact
metadata, e.g.:
<rdf:Description rdf:about=''>
<an:annotates rdf:resource='...jpg'/>
<an:author>
<foaf:Person rdf:nodeID="p1">
<foaf:name>...</foaf:name>
<foaf:mbox_sha1sum>...</foaf:mbox_sha1sum>
</foaf:Person>
</an:author>
<an:created>2004-01-25T20:04:50Z</an:created>
<cc:license rdf:resource="http://creativecommons.org/licenses/..." />
<dc:rights rdf:nodeID="p1"/>
</rdf:Description>
but I don't know if this eases or complicates code generation and
reasoning.. I'll shut up now.
benjamin
[1] http://creativecommons.org/technology/metadata/extend
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